Lan: Do you think it's important for young people...

Câu hỏi: Lan: Do you think it's important for young people to keep fit? - Nam: ____

A. Why do they need to keep fit?

B. It's very important for old-aged people to have a healthy lifestyle.

C. I do think so. As the main labour force of the country, they must be strong.

D. It doesn't cost much to work out in the gym these days.